title: Imaging the three-dimensional Fermi-surface pairing near the hidden-order transition in URu2Si2 using angle-resolved photoemission spectroscopy.
abstract: We report angle-resolved photoemission spectroscopy experiments probing deep into the hidden-order state of URu(2)Si(2), utilizing tunable photon energies with sufficient energy and momentum resolution to detect the near Fermi-surface (FS) behavior. Our results reveal (i) the full itinerancy of the 5f electrons, (ii) the crucial three-dimensional k-space nature of the FS and its critical nesting vectors, in good comparison with density-functional theory calculations, and (iii) the existence of hot-spot lines and pairing of states at the FS, leading to FS gapping in the hidden-order phase.
authors.affiliation: Los Alamos National Laboratory, Condensed Matter and Magnet Science Group, Los Alamos, New Mexico 87545, USA.
authors.forename: Jian-Qiao
authors.initials: JQ
authors.lastname: Meng
authors.forename: Peter M
authors.initials: PM
authors.lastname: Oppeneer
authors.forename: John A
authors.initials: JA
authors.lastname: Mydosh
authors.forename: Peter S
authors.initials: PS
authors.lastname: Riseborough
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Gofryk
authors.forename: John J
authors.initials: JJ
authors.lastname: Joyce
authors.forename: Eric D
authors.initials: ED
authors.lastname: Bauer
authors.forename: Yinwan
authors.initials: Y
authors.lastname: Li
authors.forename: Tomasz
authors.initials: T
authors.lastname: Durakiewicz